Datasheet

MACX MCR-UI-UI-UP(-SP)(-NC)
104247_en_01 PHOENIX CONTACT 10
8.3 Inverse characteristic curve (rising input
signal, falling output signal)
• Use DIP switch S1 to set the input range, DIP switch S2
to set the limit frequency/signal conversion, and DIP
switch S3 to set the output range.
Example:
Input range IN
min
... IN
max
= -10 V ... +10 V
Output range OUT
min
... OUT
max
= +10 V ... 0 V
• Specify the input signal using a calibration device and
measure the output signal using a multimeter:
– Specify the final value of the input range
(e.g., IN
max
= +10 V).
– Measure and save the output signal
(Measured value 1 = e.g., 0.2832 V).
– Specify the initial value of the input range
(e.g., IN
min
= -10 V).
– Measure and save the output signal
(Measured value 2 = e.g., +10.4238 V).
• Calculate the FS (full-scale) adjustment point:
– Range = Final value of output range - Initial value of
output range
– (E.g., range = OUT
max
- OUT
min
= 10 V - 0 V = 10 V)
– FS adjustment point = Measured value 2 x Range/
(Measured value 2 - Measured value 1)
– E.g., FS adjustment point = +10.4238 V x 10 V/
(+10.4238 V - 0.2832 V) = 10.2793 V
• Adjustment process:
– Specify the minimum input signal of the set range
(e.g., IN
max
= -10 V).
– Adjust the output signal using the SPAN
potentiometer to the calculated FS adjustment
point (e.g., 10.2793 V).
– Then adjust the output signal using the ZERO
potentiometer to the final value of the output range
(e.g., +10 V).